Math: Converting to Images

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Math Converting to Images

• Yuping Tseng
• Grainger Engineering Library Information Center
• University of Illinois at Urbana-Champaign
• http//dli.grainger.uiuc.edu
  ytseng1_at_uiuc.edu

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Math Converting to Images

• What to convert?
• All independent formulas, I.e. formulas with
  ltdformulagt tag.

• Some inline formulas, formulas inside a text line
  or a table, with specific patterns such as
  radical or fraction.

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Math Converting to Images

• How to convert?
• Display document in Internet Explore
• Hide irrelevant information leaving only the
  target formula
• Resize the display window to fit in the formula
• Trim blank and check if there is unknown symbol
  (shown in red)
• Capture the display window and convert the image
  to JPEG format.
• Process is fully automated (Visual Basic)

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Math Converting to Images

• Modify original XML file
• Insert additional attributes in the formula tag
• For independent formulas
• For example ltDFORMULA ID"E1" xmllink"simple"
  href "DFORMULA_E1.jpg" show"embed"
  actuate"auto" title"Mathematical Equation E1"gt
• Inline formula with specific patterns
• For example ltFORMULA ID"CNT2_0"
  xmllink"simple" href"FORMULA_CNT2_0.jpg"
  show"embed" actuate"auto" title"Mathematical
  Equation CNT2_0"gt

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Math Converting to Images

• Remaining issues
• formulas larger than screen size
• Hide the right information without hiding the
  formula itself (markup issue)
• Re-positioning formulas after hiding irrelevant
  information
• Unknown symbols
• Require some manual processing